Zhongnanshan Tunnel
The 40th longest tunnel in the world
Zhongnanshan Tunnel, or Qinling Zhongnanshan Tunnel in Shaanxi province, China, is the longest two-tube road tunnel in China. It is also the fifth longest road tunnel in the world, after the Lærdal Tunnel in Norway, WestConnex in Australia, the Tianshan Shengli Tunnel in China and the Yamate Tunnel in Japan. The 18,040-metre (11.21 mi) long tunnel, crosses under the Zhongnan Mountains (Zhongnanshan). It opened on 20 January 2007, becoming part of the Xi'an-Ankang Highway between Chang'an and Zhashui. The cost to build the tunnel was 3.2 billion yuan (US$410 million). The maximum embedded depth of the tunnel is 1640 metres below surface level.
Tunnel data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).